Design

For our interactive visualization, we wanted it to be exploratory for a viewer or organization. Since the motivating question for our project focusing on the current status and location of trees along the Mass Ave corridor, we felt the best route was to make a map the main aspect of our interactive visualization. Using the dataset provided by Speak for the Trees, we were able to obtain the location of trees as latitude/longitude (X/Y) coordinates as well as what postal code they are a part of. With this as well as a geojson file we found online, we were able to plot our coordinates on top of a map, so we are able to use color and clustering to represent the different postal codes of Boston. As for our supplementary visualizations, we wanted to more clearly represent differences between postal codes and different types of trees. Our first visual is just a simple bar chart representing the number of trees by postal code, and can update if a user wants to look at a certain area of Boston. Our second visual represents the most common trees across Boston, while also color coded to demonstrate the distribution of each type of tree in different postal codes. We also added the functionality for a user to select any individual postal code through a dropdown which will display just that postal code's data, and the Most common Trees stacked bar chart is also linked so we can see the individual distribution of one type of tree across Boston.